LT3757
LT3757A

PRODUCTION

Boost, Flyback, SEPIC and Inverting Controller

Data Sheet (Rev. H) Product Selection Table
Viewing:

Overview

  • Wide Input Voltage Range: 2.9V to 40V
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Current Mode Control Provides Excellent Transient Response
  • Programmable Operating Frequency (50kHz to 1MHz) with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1µA
  • Internal 7.2V Low Dropout Voltage Regulator
  • Programmable Input Undervoltage Lockout with Hysteresis
  • Programmable Soft-Start
  • Small 10-Lead DFN (3mm × 3mm) and Thermally Enhanced 10-Pin MSOP Packages
  • AEC-Q100 Qualified for Automotive Applications
LT3757
LT3757A
Boost, Flyback, SEPIC and Inverting Controller
LT3757/LT3757A Application Circuit LT3757/LT3757A Performance Graph LT3757/LT3757A Pin Configuration LT3757/LT3757A Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 3

Application Note 1

Technical Articles 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT3757
  • LT3757A

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

  • LT3757(SEPIC
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

eval board
schematic 1
DC1341B

LT3757EDD SEPIC Demo Board | 4.5V ≤ VIN ≤ 36V; VOUT = 5V @ 3A

Buy Now View Details

Product Details

Demonstration circuit 1341B features LT3757A in a 300kHz SEPIC converter circuit, designed for a 5V at 3A output from a 4.5V to 36V input voltage range.

 

eval board
schematic 2
schematic 3
DC1547B

LT3757AEDD Boost Demo Board | Boost, 3.1V ≤ VIN ≤ 9V; VOUT = 12V at 1.5A

Buy Now View Details

Product Details

Demonstration circuit 1547B features the LT3757AEDD in a 400kHz BOOST converter circuit, designed for a 12V output from a 3.1V to 9V input voltage range.


The LT3757A operates over an input range of 2.9V to 40V, suitable for applications from single-cell lithium-ion battery portable electronics up to high voltage automotive and industrial power supplies. It also exhibits low shutdown quiescent current of 1μA, making them an ideal fit for battery-operated systems. Thanks to a novel FBX pin architecture, the LT3757A can be connected directly to a divider from either the positive output or the negative output to ground. The LT3757A has improved load transient performance compared to the LT3757.

eval board
schematic 4
DC1548A

LT3757EDD Inverting (CUK) Demo Board | 7V-28VIN; VOUT = −15V at 1A

Buy Now View Details

Product Details

Demonstration circuit 1548A features the LT3757EDD in a 300kHz CUK converter circuit, designed for −15V output from a 7V to 28V input. The LT3757EDD operates over an input range of 2.9V to 40V, suitable for applications from single-cell lithium-ion battery portable electronics up to high voltage automotive and industrial power supplies. It also exhibits low shutdown quiescent current of 1μA, making them an ideal fit for battery-operated systems. Thanks to a novel FBX pin architecture, the LT3757EDD can be connected directly to a divider from either the positive output or the negative output to ground. It also packs many popular features such as soft-start, input undervoltage lockout, adjustable frequency and synchronization in a small 10-lead MSOP package or a 3mm × 3mm QFN package.

eval board
schematic 5
DC1341A

LT3757EDD SEPIC Demo Board | 4.5V-36Vin; Vout = 5V @ 3A

Buy Now View Details

Product Details

Demonstration circuit 1341A features LT3757EDD in a 300kHz SEPIC converter circuit, designed for 5V output from a 4.5V to 36V input.


The LT3757EDD operates over an input range of 2.9V to 40V, suitable for applications from single-cell lithium- ion battery portable electronics up to high voltage automotive and industrial power supplies. It also exhibits low shutdown quiescent current of 1µA, making them an ideal fit for battery-operated systems. The IC integrates a high voltage, low dropout linear (LDO) regulator. Thanks to a novel FBX pin architecture, the LT3757EDD can be connected directly to a divider from either the positive output or the negative output to ground. They also pack many popular features such as soft-start, input undervoltage lockout, adjustable frequency and synchronization in a small 10-lead MSOP package or a 3mm × 3mm QFN package.

eval board
schematic 6
schematic 7
schematic 8
schematic 9
AD-RPI-T1LPSE-SL

2-port 10BASE-T1L RPi-based PLCS/DCS/Field Switch with SPoE PSE

Buy Now View Details

Features and Benefits

  • Software-controlled power and data forwarding
  • Multiple SPoE classes
  • On-board 24V/54V power supply
  • External power supply option
  • On-board PSE controller
  • Compatible with Raspberry Pi 3+
  • Multiple USB power options
  • Serial Communication Classification Protocol (SCCP)-ready

Product Details

The AD-RPI-T1LPSE-SL is a 10BASE-T1L MAC/PHY interface with Single Pair Power over Ethernet (SPoE), designed for developing field devices and applications on the Raspberry Pi platform. It functions as Power Sourcing Equipment (PSE), capable of delivering power to other devices over a 10BASE-T1L network.

The board can be powered via USB-C (M1, up to 20V) or through a Pluggable Terminal Block (P21, up to 60V). A synchronous step-down DC-DC converter supplies a regulated 5V to the Raspberry Pi.

The system supports SPoE Class 10–12 (nominal 24V) and Class 13–14 (nominal 55V), enabling flexible power configurations for various industrial and embedded applications.

Designed for use on the Raspberry Pi platform, the AD-RPI-T1LPSE-SL hardware features a 40-pin GPIO header and uses an extended version of the standard HAT.

APPLICATIONS

  • Factory automation
  • Process control
  • Intelligent buildings
  • Secure field instruments
  • Internet of Things
DC1341B
LT3757EDD SEPIC Demo Board | 4.5V ≤ VIN ≤ 36V; VOUT = 5V @ 3A
DC1341B
DC1547B
LT3757AEDD Boost Demo Board | Boost, 3.1V ≤ VIN ≤ 9V; VOUT = 12V at 1.5A
DC1547B Demo Board DC1547B - Schematic
DC1548A
LT3757EDD Inverting (CUK) Demo Board | 7V-28VIN; VOUT = −15V at 1A
DC1548A - Schematic
DC1341A
LT3757EDD SEPIC Demo Board | 4.5V-36Vin; Vout = 5V @ 3A
DC1341A - Schematic
AD-RPI-T1LPSE-SL
2-port 10BASE-T1L RPi-based PLCS/DCS/Field Switch with SPoE PSE
AD-RPI-T1LPSE-SL Evaluation Board Angle View AD-RPI-T1LPSE-SL Evaluation Board Top View AD-RPI-T1LPSE-SL Evaluation Board Bottom View AD-RPI-T1LPSE-SL Block Diagram

Latest Discussions

34 Weeks Ago
LT3757 Based 350 V @ 2 mA Adjustable Power Supply Using DAC Control
34 Weeks Ago
60V and -15V supply application
1 Years Ago
Help with Adjustable 15V–100V Power Supply (100mA Limit) Controlled by Microcontroller
View related discussion on EngineerZone®

Recently Viewed